The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 01, 2020
Filed:
Jun. 09, 2017
Daikin Industries, Ltd., Osaka-shi, Osaka, JP;
Shuuji Itatani, Osaka, JP;
Mihoko Ohashi, Osaka, JP;
DAIKIN INDUSTRIES, LTD., Osaka, JP;
Abstract
There is provided a method for producing a C-Cfluorine-containing organic acid with reduced fluorine-free organic compound. A method for producing a C-Cfluorine-containing organic acid, the method including contacting a mixture containing a C-Cfluorine-containing organic acid and a fluorine-free organic compound with a concentrated sulfuric acid and then separating a C-Cfluorine-containing organic acid phase from a concentrated sulfuric acid phase. The contacting is conducted such that an amount of water present in the concentrated sulfuric acid phase is 10% by mass or less, and the C-Cfluorine-containing organic acid is obtained in the form of the C-Cfluorinated organic acid phase having a reduced content ratio of the fluorine-free organic compound compared with said mixture.